{
  "manageEntity": {
    "action": "Save",
    "entityId": "224115",
    "entityType": "Track",
    "nonce": "0x308bb970b55c366434e03013ab883eeb5cf95d0e1fa58cc676e852036d07db41",
    "signature": "0xc3864ee62c9c8f7ef168c799411d902ffd4efd81cf911cd2c6f4d058bcaccb4e2a27e8050c6eb09e456e65ebeba16a69b8e683a8fe01e9b12ab2ec909e7e9af71c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}