{
  "manageEntity": {
    "action": "Save",
    "entityId": "1864445258",
    "entityType": "Track",
    "nonce": "0xcb23b01a419e1859935ebc83f62a39b62e97a01014561abae908d0dd8d77ffb9",
    "signature": "0x255804201cd34831db795f861bc3e2016cc76c70f99b86b15fb05febded608360d073861e7c603a23d252ac1683165c5d22dfeaf341cffc5d4100086c88c1b921c",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}