{
  "manageEntity": {
    "action": "Save",
    "entityId": "614264540",
    "entityType": "Track",
    "nonce": "0x04f96bd20197ee1a388b9705dddde7dad61771d38df55d3b6fc62c1de5c384ce",
    "signature": "0x3cb75870148064e1b19ffbab4f346ddcb38b9029f04dbe6872607e2d071eaad43b751e33f750d25551498992f911dbc337d531533cf1a6145b7041d2893f5aec1b",
    "signer": "0xf63b89A0Bbc03C7ec59aC257C7082A056082cDB8",
    "userId": "558452493"
  }
}