{
  "manageEntity": {
    "action": "Save",
    "entityId": "1798548750",
    "entityType": "Track",
    "nonce": "0xf315c4bea8b863dd0f2ccb1350299e5d6af0536ed673e17e4a497db284a0fa0a",
    "signature": "0x401b93d94d7a1d1e1627f270460a116d550bcc74e3caee450c2850d4f827c6bb4ddb206ebda646f388ccedcec2c0aa1571803f07fddbb03417c3b280f1ebbf401b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}