{
  "manageEntity": {
    "action": "Save",
    "entityId": "913719971",
    "entityType": "Track",
    "nonce": "0xd35899dc7be288df9d7edfbafbb5ef5f32896efa2cf2c7042b8796268d251e60",
    "signature": "0x70c127a5cb95cfc66ffc1fbced2c2964c7211b464cafb8f5912e4cea89ce687136650716144e4a08b0421b89ac9e2a4e0b93286a7728203d76f227a2e8dcc5101b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}