{
  "manageEntity": {
    "action": "Save",
    "entityId": "864171",
    "entityType": "Track",
    "nonce": "0x263720b34a6754563b63bbf6c628075d0b05174b0c9facfde576618aa1af26b5",
    "signature": "0xd79aac05174fecf9f87ba7248c57a7a1fd2186cc742afa5d6954ecd81a5e89ff3111ba2db0dee5266690cec54d04bd771a556ceab282584152e4b94cf7da2b641c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}