{
  "manageEntity": {
    "action": "Save",
    "entityId": "351344",
    "entityType": "Track",
    "nonce": "0x37adf097190970b3594283e0d91dc4c06e9d2c27cf9898ca15a6169f47f3649c",
    "signature": "0x0128cf3ae93c70364cbfa68b434170e0d50fd4162b04bed22b8500f6d83503b12d4cfdf4c12e20803a46692ef538621800b85f1d23ec79a1de4a63b1fd9729d01c",
    "signer": "0xEbf223E3bfE29c251Ee19f0d3515DDDA00B0Ad60",
    "userId": "2018345"
  }
}