{
  "manageEntity": {
    "action": "Save",
    "entityId": "1143587920",
    "entityType": "Track",
    "nonce": "0xdd20a9c1ceeac5a47e5c398eb92c1d8dc9e554685e91d6c4da514efaf67524d8",
    "signature": "0xa339df52284c706a8a2dd39da4927d046c7ef16978f83a5c94876ff30801bbb60d3770c3baa9fb02c795c344f2282264090002a998648e941e04804a25746a3b1b",
    "signer": "0x33c702d534707f8Cada5DdD521C5900827973f1D",
    "userId": "5642"
  }
}