{
  "manageEntity": {
    "action": "Save",
    "entityId": "1240467805",
    "entityType": "Track",
    "nonce": "0x8cf869df67365dd449972d3a347ba4fe220f9398a0d773941cecdb09b0f3e464",
    "signature": "0x2759cb7e0bee024470f859739225a3c180c05ce2b06a277b2b9ae27873480ae464ad43a1ae87ed29103ba3cc20a3732819a087374df9238aa89cb34a6dc618721c",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}