{
  "manageEntity": {
    "action": "Save",
    "entityId": "1369234827",
    "entityType": "Track",
    "nonce": "0x1512a0a70e6976fa41c44324fc23a08d29602a16e0f8274551a5822c2547d966",
    "signature": "0xa27ae0ddda444c7234dad2d7cfc84560399d9c5ee4203972e061eea341c9dd6c4bed23b9dfceb19e719e4dd97b974238763049e1b2eeace19a771b519189310f1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}