{
  "manageEntity": {
    "action": "Save",
    "entityId": "1415090409",
    "entityType": "Track",
    "nonce": "0x7b6950b3a712a890f51d191d52f916a519bdfc0283812e32785aae37ab245f60",
    "signature": "0xd38e23a2cbb8a20cd49250d26410bc04fcc76072dbc34542370306dc76e6a20e4026f6aa312a62a5989d9d79caf66e1acd889957e2a7c4e075f3a0ba8cf7d1f11b",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}