{
  "manageEntity": {
    "action": "Save",
    "entityId": "702232097",
    "entityType": "Track",
    "nonce": "0xa06f3a098360c205572e54e7a2df73d7c3c3c9a25662d6a1e97bc7d209b638a1",
    "signature": "0x3b4a1c9289b7abcf36e9cd30564bc113080879e5a3c50e736e0208834070c32545f9c8eee5f7c10a3c067fc9a78b828e06521ef31e0e5703794f0a6cc5e132611b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}