{
  "manageEntity": {
    "action": "Save",
    "entityId": "1124588612",
    "entityType": "Track",
    "nonce": "0xad7138eb1100e339e0d70a8379d6c56bc921a18e9209b39bc173bb28c5ce03eb",
    "signature": "0x7ab88249a7a28a54e2555f4277da7634b307aab29d267159d7203f8e3a2a6a8a3f4a2d05c516813f5d41b13dd42e38ce5ff671fa5f0df2b23e2bdcbfd2ca1bbd1c",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}