{
  "manageEntity": {
    "action": "Save",
    "entityId": "1863115769",
    "entityType": "Track",
    "nonce": "0x03e7270157202a3024db5eaaeac96868bf049792320885174646695696496cee",
    "signature": "0x83dce616a88925d026a33edff4231e5cb9d2d615275146852096d2b56e78b55461cc31f8d9d92632041e7a30084f248b64b8270faa9651e89aa3f6615c40db6f1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}