{
  "manageEntity": {
    "action": "Save",
    "entityId": "714474124",
    "entityType": "Track",
    "nonce": "0x6722e2c8566f1d96a30fe5216438d8c8916982f90aec80db727fe3d1ba7424d2",
    "signature": "0x873a9d8b427a4bc96e1f24e8463249384212662b72adaafe1bbbb145f5082358562641a274a952c0cc90bf6086357a175ad80997ba348c482e31b4f48e97ad9f1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}