{
  "manageEntity": {
    "action": "Save",
    "entityId": "1703248148",
    "entityType": "Track",
    "nonce": "0x477e4595ccc4afe66887b4f606eb1d9c21628616a12519f1e60f6b7465599aa7",
    "signature": "0xb701c37fe36d33cfeaeb970558b9abf26ade4382a926842284ef2c624067dcda636d31fd9d983d1bbecba8772e87c04a45ce1ffd1046c91b4112ac78395ab7471b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}