{
  "manageEntity": {
    "action": "Save",
    "entityId": "162773911",
    "entityType": "Track",
    "nonce": "0x2db71e18b2cfea6770ba3dafa749eff8fcf3b7242eab0e9e9997f5b5106ef73c",
    "signature": "0x74142207ddc738ba42bb4382693b205298ee2d61488341a173230e39ccf16db60031569389c324fe19083dacbb59f34207f99ce4baab66796bffca7a0e7737ad1c",
    "signer": "0x775bA7FB8a4FF9354c099465ca493BA949FdAca6",
    "userId": "597677270"
  }
}