{
  "manageEntity": {
    "action": "Save",
    "entityId": "200192346",
    "entityType": "Track",
    "nonce": "0xdf7b552f9a16e07eb0b8be0b673bc101b41af05a8cc56aaa0d42434e8d6408f1",
    "signature": "0xb563c0e3a1e59fdc7abe9b93bb0b13ca5f3e871aa16a0e914da896e62297bee8595f42526d24ebd33fc7f67abbfa7bb7eaf9208768af1502eb65b3a06ee11a4f1b",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}