{
  "manageEntity": {
    "action": "Save",
    "entityId": "432783460",
    "entityType": "Track",
    "nonce": "0xda0216f03a32ec48cf1c1f17331021cc0a3184ccf66c8c2034ff12e3d9475119",
    "signature": "0xbb46fa92ca0e1802aed549fc1b552fc44e60449cbaffc6ca22da936ce3d909b865d423e4a6298ba3da82a45ec8ce484a6ab9bb9385c16947d5ccbbbcc01ad9a91b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}