{
  "manageEntity": {
    "action": "Save",
    "entityId": "1275031395",
    "entityType": "Track",
    "nonce": "0xc9b3d377b2f1af3492ed57ba88d01450b06f5e6f4a7f168a36c3a0d0b29f840d",
    "signature": "0xef83380d1e5fc81e8d1e35175cd16ab096a1db81bdfc492b08db6c58d3fe1d085fad28cb81d780c87a88108bad5d904b418e2903f0b85c1875b711c00e3b0aec1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}