{
  "manageEntity": {
    "action": "Save",
    "entityId": "548740993",
    "entityType": "Track",
    "nonce": "0xe62259d9caef5140aff584337f9dbcb1aad4a00cb25693696300a929662df68c",
    "signature": "0x7beec4249b665493a206e22b64d4add64f5bd824e72adc4303c02e1bb9a08a325cfdc7bd709c3b91f020c76a6502a7cedd9785f9cba7994b66c4fd6d691917041c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}