{
  "manageEntity": {
    "action": "Save",
    "entityId": "1444318176",
    "entityType": "Track",
    "nonce": "0xe1e7ce53fab710c70c40c53e794f469ec54aaa4d973d7c7e60e61574662ccc64",
    "signature": "0x064df7f43f531a5b7d95ee9aabbf9ece1332e6021196a43d38d09669dacedfd57d172eb44e1a346c0278351bce4747490011235317fa7384df52bf5e2e175c531b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}