{
  "manageEntity": {
    "action": "Save",
    "entityId": "801455",
    "entityType": "Track",
    "nonce": "0x318dba4ef21d3de5da490f038540d5e0c19d1355a06ad32c8a357a81bb91ec3f",
    "signature": "0xf900b30f9d0242847a4b459a5e5fceaf7e6f48374d3fcee0ca992499cdbb11cd35728c7a802ba1b09d341c82a57b8545a9f64cf1042cd3b2f50290868ff212281c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}