{
  "manageEntity": {
    "action": "Save",
    "entityId": "896034762",
    "entityType": "Track",
    "nonce": "0x751a8535a1aafc6c9fdff15e0564fc6fbd3da7cf89b6dbe5649307245ba63718",
    "signature": "0x28019523269246c7ea05b6cc316b463844590c06d7af3bb4541772c13702cdad673a30369de7c19d437e87380f6376d7dd8aa9f25718a256300c358600d026141c",
    "signer": "0x4086Dda2D91F77cd46De0859a4de37F888508faA",
    "userId": "568518925"
  }
}