{
  "manageEntity": {
    "action": "Save",
    "entityId": "1603555980",
    "entityType": "Track",
    "nonce": "0x3670a163a1b1f4ee6fa531ff2d95eeca1476f6eb51f97b1314f75d334ba03931",
    "signature": "0xbaacf7eda1e14e51687fc65e494a0d73b375f6a599a01108bff5feb8c0922fd744e0ee36b84d6a796396ff4da29cd80fb0bd5148721ddc8d74c80eabdb4cbc2f1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}