{
  "manageEntity": {
    "action": "Save",
    "entityId": "1340524962",
    "entityType": "Track",
    "nonce": "0x40b2220b02fc570ee065a1794cd8096a19cf675909055555c2269ba953601cb7",
    "signature": "0x916887b6592d6ba9d79752a775daf38b2e96f48b6f4a6211b32398adf7d5e67369af8752376fc10ff0bdbb9ac8ab615d32497d25197b781ba524be331a12839a1c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}