{
  "manageEntity": {
    "action": "Save",
    "entityId": "1284015144",
    "entityType": "Track",
    "nonce": "0x19cf49acec52aab0295529f3b37edb72fc03b25bd7c981ce18f4879c58faaf66",
    "signature": "0xce0069a824282b6f045c9771fdb824530644143d6ab2f437eb652fd656a996062d00e2df4c7166cdb9993280bb80c011d205e74262f4dacd262aa60a8f03e38a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}