{
  "manageEntity": {
    "action": "Save",
    "entityId": "858137386",
    "entityType": "Track",
    "nonce": "0x55f17882d898df0a6a58e0ff1db742ca17b872581dbe72a193ef4e7cb03a6dce",
    "signature": "0xbf64bbc36ccbc54a33f087f1c8c44fc0efbcf14195dbdd1a6618d36ef35a78d75c915d5157dea162d7753b54861040c15344eabfa07805ef1bb03e3f7f932b091c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}