{
  "manageEntity": {
    "action": "Save",
    "entityId": "156922989",
    "entityType": "Track",
    "nonce": "0x1265af4dd7ac30ddde43fbdc820cfec48ba12f1c1889044f7e7c2a6cb2fa83f7",
    "signature": "0xf4b3c24bc49f08ccc830f5223d2ee4f74212494370c425d096c562b195c174ff5923987eae8fc02d9caa0e5f7b940c21538d3153303ee4c6ecb43453e163409d1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}