{
  "manageEntity": {
    "action": "Save",
    "entityId": "1183611802",
    "entityType": "Track",
    "nonce": "0xd9df942f8715abb45e78e11f02e998f8638729276f497d7ccaf33697880ab9a8",
    "signature": "0xed3ef9470b704e3b2f17ba3bb755723684129d1b1a6606a9abdaa3ce30711e5520d8a8499893c19c0a046cd3f6d23fb85583750b05ea3298833b1eb2bb600ab71c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}