{
  "manageEntity": {
    "action": "Save",
    "entityId": "1062816981",
    "entityType": "Track",
    "nonce": "0x6ee4b5576278517d4d5afad584952e8bde04d3ae3c2ca87e4f5c8fc051e1f7c5",
    "signature": "0x73d9685d35aa11b0f672490a8e5fa31d0be4cb9a1802f41e84bdd413c279fd680e4bca8b67a87bc02c3ed3ad3aaab1622f48a5fd70e3b2b8b62ad98d61f28ac41b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}