{
  "manageEntity": {
    "action": "Save",
    "entityId": "1558076733",
    "entityType": "Track",
    "nonce": "0xe9729403457558fb554a927e49bbf849cfd6037a62c0c421754c1495ce68bd4e",
    "signature": "0x01b002d8434892be0cc7af6f876e93166cf331d266e2197377f8d505f337bc9a5d89b8f40a953fa5f170ea4cd6b081ce8de7bfc4ebd1771cadd79c4c2a4c5d351b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}