{
  "manageEntity": {
    "action": "Save",
    "entityId": "694689053",
    "entityType": "Track",
    "nonce": "0xfde44d02633acd1f462ba72f2da433ee45dfe3f75112efe84c28e90e0e058211",
    "signature": "0xed99411d5beeb512b592175adc8ce26d255c15a91670e1417f75e03d2df7d0dc28cef5fcb4f8bee2b1ee4fbc6462b39576d10b2004f8b582492d8d0e6206f03d1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}