{
  "manageEntity": {
    "action": "Save",
    "entityId": "516184098",
    "entityType": "Track",
    "nonce": "0x32675aa4a40ce4bb6b8470dcfd27297e3595d89baa702e106a0141f8f33ee3ef",
    "signature": "0xd3a8c7f83fdb0c215c55db3ed747568f8f66ab4618f8254bd4fa68625aabacf44364540ee046e967a9ebebc8719a5f3223f5dc820844f20886dea5a8825a8e4c1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}