{
  "manageEntity": {
    "action": "Save",
    "entityId": "1192044918",
    "entityType": "Track",
    "nonce": "0xe7c5888c7880580027549d227147814043075b8716c2127a241ed947638cf7b0",
    "signature": "0x47bcd148a39f6d319fd918d51efa9b5ef69d59ec91dc101d2d351730590f45996b7033d87db4b5220faca57e6b7e641bf3a88a914f4b6f6de531f42f76cb29a91c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}