{
  "manageEntity": {
    "action": "Save",
    "entityId": "381912818",
    "entityType": "Track",
    "nonce": "0x3efc1d4c7070e91781dafd077d59fe77f72b426a2b8c78597630d8f23f8c5fb9",
    "signature": "0x8256ba4d9c6d734dce75a3a43128aa1e6e188bd92dc74801acd13eb3d966aa677fc01fce33d703430cbbce22560c596ff39d94a17ae6168353d6c40652a2d94e1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}