{
  "manageEntity": {
    "action": "Save",
    "entityId": "1111456",
    "entityType": "Track",
    "nonce": "0x3ec2967745b98733ff4309aeaf9a20655525309d932d4229e35be656bc268e2a",
    "signature": "0x9f96bee5fde849ee4e08779eb6ed6ea4444f65d4f45fdb25c19c8152c7ce2a552eef8bc0104e15299bf3e1ac12bd51fdd18e2c48f8a6caa676ada9fb2af188281c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}