{
  "manageEntity": {
    "action": "Save",
    "entityId": "2104086335",
    "entityType": "Track",
    "nonce": "0x475522387da8642f8ede32f2665e87f51ae977b36ec083f85a3f271109945bfe",
    "signature": "0x417a87af947d2a613e7ab95bc060c8fd7bd6d04d31f286ae88c9894471c7c48f47dc7ad30180bfe486d29bee69abd8862c13a7a60e7985be2df4cec9cb396ef11c",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}