{
  "manageEntity": {
    "action": "Save",
    "entityId": "1016176094",
    "entityType": "Track",
    "nonce": "0x19b0ccc8b12f64e1df5c1b3e43c02947366a9ae59df90b771d4289f4a247f5bf",
    "signature": "0x743441fce6d631728706e2cd8dfd16dfe0473ba3e89f02ff409216fbd5992eab67961cb221b603592d9c0077cef5bdad16a308af31ecbfe421d368470e9d6a091c",
    "signer": "0x40f9c8F93a5aDBc620CB9B7707fAbcbA2fDFaBbA",
    "userId": "765901034"
  }
}