Something like this...
[{"id":"96f97c9a4772bf8b","type":"inject","z":"a974952f9392fa56","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":560,"y":1060,"wires":[["8870054357eceb69"]]},{"id":"8870054357eceb69","type":"template","z":"a974952f9392fa56","name":"your data","field":"payload","fieldType":"msg","format":"json","syntax":"mustache","template":"{\n \"viewer\": {\n \"home\": {\n \"id\": \"uniqueid1\",\n \"currentSubscription\": {\n \"id\": \"uniqueid2\",\n \"priceInfo\": {\n \"current\": {\n \"total\": 1.7443,\n \"energy\": 1.3188,\n \"tax\": 0.4255,\n \"startsAt\": \"2022-10-18T17:00:00.000+02:00\",\n \"level\": \"VERY_EXPENSIVE\",\n \"currency\": \"SEK\"\n },\n \"today\": [\n {\n \"total\": 0.4291,\n \"energy\": 0.2666,\n \"tax\": 0.1625,\n \"startsAt\": \"2022-10-18T00:00:00.000+02:00\",\n \"level\": \"CHEAP\",\n \"currency\": \"SEK\"\n },\n {\n \"total\": 0.4243,\n \"energy\": 0.2627,\n \"tax\": 0.1616,\n \"startsAt\": \"2022-10-18T01:00:00.000+02:00\",\n \"level\": \"CHEAP\",\n \"currency\": \"SEK\"\n },\n {\n \"total\": 0.3157,\n \"energy\": 0.1758,\n \"tax\": 0.1399,\n \"startsAt\": \"2022-10-18T23:00:00.000+02:00\",\n \"level\": \"VERY_CHEAP\",\n \"currency\": \"SEK\"\n }\n ],\n \"tomorrow\": [\n {\n \"total\": 0.3143,\n \"energy\": 0.1747,\n \"tax\": 0.1396,\n \"startsAt\": \"2022-10-19T00:00:00.000+02:00\",\n \"level\": \"VERY_CHEAP\",\n \"currency\": \"SEK\"\n },\n {\n \"total\": 0.3103,\n \"energy\": 0.1716,\n \"tax\": 0.1387,\n \"startsAt\": \"2022-10-19T01:00:00.000+02:00\",\n \"level\": \"VERY_CHEAP\",\n \"currency\": \"SEK\"\n },\n {\n \"total\": 0.311,\n \"energy\": 0.1721,\n \"tax\": 0.1389,\n \"startsAt\": \"2022-10-19T02:00:00.000+02:00\",\n \"level\": \"VERY_CHEAP\",\n \"currency\": \"SEK\"\n },\n {\n \"total\": 0.365,\n \"energy\": 0.2153,\n \"tax\": 0.1497,\n \"startsAt\": \"2022-10-19T23:00:00.000+02:00\",\n \"level\": \"VERY_CHEAP\",\n \"currency\": \"SEK\"\n }\n ]\n }\n }\n }\n }\n}","output":"json","x":710,"y":1060,"wires":[["b9f6375f64e9a9ec"]]},{"id":"b9f6375f64e9a9ec","type":"function","z":"a974952f9392fa56","name":"join arrays","func":"\nconst today = msg.payload.viewer.home.currentSubscription.priceInfo.today\nconst tomorrow = msg.payload.viewer.home.currentSubscription.priceInfo.tomorrow\nmsg.payload = [...today, ...tomorrow]\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":550,"y":1120,"wires":[["acdbe412348134fa","fbe14ea8bf5167dc"]]},{"id":"acdbe412348134fa","type":"split","z":"a974952f9392fa56","name":"","splt":"\\n","spltType":"str","arraySplt":1,"arraySpltType":"len","stream":false,"addname":"","x":740,"y":1120,"wires":[["20710b9c66fb1a5d","b5898d56b6cd9e15"]]},{"id":"fbe14ea8bf5167dc","type":"debug","z":"a974952f9392fa56","name":"debug 118","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":570,"y":1180,"wires":[]},{"id":"20710b9c66fb1a5d","type":"debug","z":"a974952f9392fa56","name":"debug 119","active":false,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":790,"y":1180,"wires":[]},{"id":"b5898d56b6cd9e15","type":"function","z":"a974952f9392fa56","name":"prep URL","func":"\nmsg.url = `http://ip_address/api/v1/${msg.payload.currency}`\nmsg.method = 'post'\nmsg.payload = {\n total: msg.payload.total,\n energy: msg.payload.energy,\n tax: msg.payload.tax,\n level: msg.payload.level,\n timestamp: new Date(msg.payload.startsAt).valueOf()\n}\nmsg.headers = {\n 'my-header': 'some-value'\n}\n\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":900,"y":1120,"wires":[["4b919a74080fdf72"]]},{"id":"4b919a74080fdf72","type":"debug","z":"a974952f9392fa56","name":"to HTTP Req node →","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"true","targetType":"full","statusVal":"","statusType":"auto","x":1100,"y":1120,"wires":[]}]
