{
  "manageEntity": {
    "action": "Save",
    "entityId": "1748628228",
    "entityType": "Track",
    "nonce": "0xab5185743c4fb132025b98c6cc7b2e5f07c538912a3413f184427c32466bda25",
    "signature": "0x5bb688471c0e22c26ddb4a96d0b1c7ed4aac6ce31ef55039dfd783ed373b271675ef3102a000f4b809bebe6ccb8c9726da2365bc8252233b8cc4516ca29b81d41c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}