{
  "manageEntity": {
    "action": "Save",
    "entityId": "1389767320",
    "entityType": "Track",
    "nonce": "0x2b86b2283537f5c26129c9b4429a3d5004553048a97147411d2beb008d264a82",
    "signature": "0x1173f94040115136314b969a03c4e0dd89351968f998049afe294bdb3ee27ba36fd86c948254401693375f2420c6e609524f993ac29b2f5665748fcfe5045a851b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}