{
  "manageEntity": {
    "action": "Save",
    "entityId": "1144732778",
    "entityType": "Track",
    "nonce": "0xf75d010ad3048bb1b7387ee60e41a10d4b9623a10811ba06a30f71c169257a2e",
    "signature": "0x0599a9b9dcaf2419db3e5b1de3c6fb75fcfdbb59edd1ae22b4547d54afd4cc532e0035d77eb419ef67430b7c2616ed6f6a7826a490dabb3928710a2bb8aafd451b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}