{
  "manageEntity": {
    "action": "Save",
    "entityId": "733698",
    "entityType": "Track",
    "nonce": "0x5f5723a58879c41af9dbc7e61e251029927f4e59f39d285db5b47f58546140f5",
    "signature": "0xd1277317f3409ddc783c7e5f1b26845fff219312810bc7efbe8f92678060736f7b5d3c32d17bcd7e9bccb89977b3c75a39a92fe0aeb55f3720881dfe05f0eed51b",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}