{
  "manageEntity": {
    "action": "Save",
    "entityId": "1398893320",
    "entityType": "Track",
    "nonce": "0xf1d87678797404237a8a412edf5cb31a7e1fd107c29b62a6bf1aaf3a781f3b9b",
    "signature": "0x8133cb4c5d2a5c744a3db756c0c02a2059f2771555cce0cb89d265250db7e9a87decbdecf224f3d2da5054685c9099a841e846c89d3076fb303be80c5cbd61b71b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}