{
  "manageEntity": {
    "action": "Save",
    "entityId": "2075079420",
    "entityType": "Track",
    "nonce": "0xad91a7e7c045c2878f9a731a4ff8d7fc889c8f0345c1d90ab366a4fd8ece99f6",
    "signature": "0xb3abe105701158c43f3dcc7a23f96941eeafb0dfea6fb19baf7369a28e9630be30dd3661cad1fcb8704a214f4b82d9b01449f96e1d79fd7f4e8ec8ebc34e3bbb1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}