{
  "manageEntity": {
    "action": "Save",
    "entityId": "1045120361",
    "entityType": "Track",
    "nonce": "0x1a2388d00433b0f45a1c77729ab0e5e96c6228073caf1009f564b2cfdeb5d027",
    "signature": "0x3794ab0235048da9b1253a43c48d2c1d287d59f6443455c405e4a4a438b0a45a2586891a949ffbf3d803ce26f288a919471deee2720218be870cd5fd63aa1b191b",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "105826"
  }
}