{
  "manageEntity": {
    "action": "Save",
    "entityId": "533904",
    "entityType": "Track",
    "nonce": "0xd63fdbc961e9b09ac1aa17d106c6037fed8ef4f0ad0eb10322a1cef724674971",
    "signature": "0xc94b124d31c6d5bf44afeb8de0b64bc7ab7681a31ecfe3e3689e5dd40b3e7095259bab0f29a5d919776dbce3664bc1f43e5ccac96388699172737fc012ff5e9b1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}