{
  "manageEntity": {
    "action": "Save",
    "entityId": "1136444479",
    "entityType": "Track",
    "nonce": "0xa1d581b5b7838d1cc11bbdecbdf3eafa55d8291e5cfd8ab12e946098ba323d63",
    "signature": "0xe6e569a9816318c0a67975260dde455313899fe7619f2f03b801648306a2feda424a5cc42f1efbc868955367ab7e5c0b95585905951b02e73298f0e06d71deaf1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}