{
  "manageEntity": {
    "action": "Save",
    "entityId": "406076",
    "entityType": "Track",
    "nonce": "0x5f0e39fc6e0325a6a859e5c49fce6abf2bdc51c825ec8780d2d73013c865a4ec",
    "signature": "0x63e5a741348154c7e27cf046dc4c569fea84ccfa82383b56386f84e583a6be1a390ef2df188d5e57ae663a1d8f46ecd28de709a9ee735d46af5677368628fe851b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}