{
  "manageEntity": {
    "action": "Save",
    "entityId": "1609314358",
    "entityType": "Track",
    "nonce": "0xc777453011f8c39693864f8c48841887e6e492b6733fa95cac354090dbddd59b",
    "signature": "0xf5e6480e343fe6d22df3d8824b12640a0e9559c3ce45177f46b6d1a6dcaca81535939fef2ffd02674dd51bf3986f0465f0d48fe3c62feaf04e29756b030ad3ed1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}