{
  "manageEntity": {
    "action": "Save",
    "entityId": "1224743176",
    "entityType": "Track",
    "nonce": "0xfa74d5a857751330f26dc49e6f5db9548a4104df8ed8016e8cbb6d3c4cbcfce6",
    "signature": "0x8e43c80f01a362c940608baa2762a26245a15728eb8c11f6752984bcb68e0fa56c58b6af8db889dbd0bdd1c9dd48e0a1d21fc317091e327600fc76c0cdfbf9221b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}