{
  "manageEntity": {
    "action": "Save",
    "entityId": "1994398239",
    "entityType": "Track",
    "nonce": "0xef780166d8a768bd9081b3507a792c58a9bb1c879a4a6cbbe90d439fe2df9a41",
    "signature": "0x358608386aa390a79a655fa5c30ad08414e9568cf67d7d4ab6168fcfbe3b9a343e4d3000984537d26fcd9591e7f8a086ddfac94c9c9ef18ae06cbb7c6bb8ddf81c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}