{
  "manageEntity": {
    "action": "Save",
    "entityId": "1996702916",
    "entityType": "Track",
    "nonce": "0x14d21e2f33012ce7b1b0e6bd66c6cf92755c190c21aab9c8f008c10008efcb48",
    "signature": "0xd6506792ceffc26d13e64ad6b48212d7faafab323548828f7663e950edfa6a8c6858b4e2d429be9b7615fd86b7940ba6345c6a3f99a46661ca18237c50bed4de1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}