{
  "manageEntity": {
    "action": "Save",
    "entityId": "947904873",
    "entityType": "Track",
    "nonce": "0x5ae875adbe30b9600c8765dba4c80f40ddfa9b02c074008cb4d32fbd8171d858",
    "signature": "0x47dea0b63531a508653f29a72f6222e4895e4668ff7b930277b5190d14b7e1f44e3785b25c60f3e5de271d2258b890c4d7a60eab1ba5315df1f179e8173464681c",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}