{
  "manageEntity": {
    "action": "Save",
    "entityId": "46466",
    "entityType": "Track",
    "nonce": "0x42f18713079dbb20e406dab0f5a175b1d33eecf947041f43f065a4b521fe80e6",
    "signature": "0xab843f953d9dec9882ed2ff41627434b173588b6988f355a3f778083a325cb0a15918fb6c529973a51034c162a5a3702e1bfa9a7314d41751be07bd433d957661c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}