{
  "manageEntity": {
    "action": "Save",
    "entityId": "1404360176",
    "entityType": "Track",
    "nonce": "0xbef549d85a116cccf8e9ed0f0b18c4c19fd1714bd40ee836bdbbd4d51c22e7a9",
    "signature": "0xd5a647fc1da598f49ff46d398e9717c12e4714191285a848184d7c0eac6d6c664cbd0bf267930a3e371a21747503aaa46efdfc98d8effd9c26ba666589fefcde1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}