{
  "manageEntity": {
    "action": "Save",
    "entityId": "514033",
    "entityType": "Track",
    "nonce": "0x4206e15e67685589f1d585446e5381b9d361ce75390b98e237d0b420ae70eb45",
    "signature": "0xb74c361463b229e3f4adda7418954bf02649e88f386a46cad3b4e14ddbf1843404cbcd223fefe52b1f94042567e662eae1b0d10af338f34dea148c76d89770341c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}