{
  "manageEntity": {
    "action": "Save",
    "entityId": "1406027814",
    "entityType": "Track",
    "nonce": "0x6a71d1b9aa113acbd76c4192071b4ceeb71d4bc390c5846647075603e15442f1",
    "signature": "0x240b16c7f4822274677343087da68499217c349daab232a7ec2d97e05dd8c6cf3ebf4cd13805618a64af617555f3c1ade8dd7206dd65c0155844a2f13b64cce01b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}