{
  "manageEntity": {
    "action": "Save",
    "entityId": "1592020883",
    "entityType": "Track",
    "nonce": "0xfc5b634111fd717431f94db68e9a22b0a0a799bf14fcaad7f21a6d6cf77940a5",
    "signature": "0xef8838a24659dd8b66df141048593a7d950f7514ec3fcf49788c419de4bd00112431c5639fee31cb61425a793e88f6f67fef704dd76bcad03d708edb031ffdc51c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}