{
  "manageEntity": {
    "action": "Save",
    "entityId": "1514211678",
    "entityType": "Track",
    "nonce": "0xf8ad871155c1310ae7430601accbd3208ec00434cad15aae4354415f85f40d9b",
    "signature": "0x18d4ecd3068bd5b59a564ba8533e238a525288ab42874bb68c8c92ef7453701818581d8e3f8005f0e308acee59ff14a42e6531c2273b6458697ce10aea3bb42d1b",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}