{
  "manageEntity": {
    "action": "Save",
    "entityId": "897162179",
    "entityType": "Track",
    "nonce": "0xa35a950b12cf8400799c2d98ad9f0cb7f7961d5e5b3ab5df9a3db1cb0600a7ee",
    "signature": "0xa03807fa5c658dd2ef30ee3e360c4b332fc7d30abf2c158a4b0d30314e3fd6a540897469ec569bd9cf59106613802decf9bbd04a55a8e5ca25bff3c707cfd5461c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}