{
  "manageEntity": {
    "action": "Save",
    "entityId": "809817887",
    "entityType": "Track",
    "nonce": "0xf0f9d0dc774ca8af65acc3ac7a5bfef3743fde9a0fa6f02efd3e6e60cdd07efc",
    "signature": "0xca01f08e70702bdc1cafee25fb551129a23c27366f986f2a4782f22b8d7043481e96ae4136a0c4449ae7f661c129e1cda25f3bc5a26109a604c34be9b14b74c61c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}