{
  "manageEntity": {
    "action": "Save",
    "entityId": "1136961293",
    "entityType": "Track",
    "nonce": "0x487308f33c578ee2305ba53b104bc324b3ed255330e1ed4894774b136c3b68ca",
    "signature": "0xeec51c2b9badcd7fe4d893db7dc0d616323cabc2a076d33f933bcafa70b46dd62ad9c792ca90a624e17e1c631420dafe8173d0737691920bfbc7a357843b5fa01b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}