{
  "manageEntity": {
    "action": "Save",
    "entityId": "1807322006",
    "entityType": "Track",
    "nonce": "0x7e752375df588f746dcaeecca2f53f5b8a58aac28df21c7520fb4c18d7ad3735",
    "signature": "0xf2511227af30baf6e16589d32a63f51208f4a8713fed7adcf93d53e0156d545e459104b156654ba8e671d41cc3dd605844608939474c9fadae414fcb8d04a5741b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}