{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121968",
    "entityType": "Track",
    "nonce": "0x4ef41e910928e5e967d764a8802fdb03cfd3e53a6b52820bafade2a03f9c39a6",
    "signature": "0x0837f0ec6385ffe6d3d3ec9660fae46f647dcfba7ab8fc75752f2d9fdcfd3c0c1b351febb86e1fd107876fd7c8359ba55f3b59dc9aebd1355c1143cb7f631ca61c",
    "signer": "0xCC89cD92c6e13cFe8FaD7993190B2DD0899Fbb58",
    "userId": "780759970"
  }
}