{
  "manageEntity": {
    "action": "Save",
    "entityId": "1092449",
    "entityType": "Track",
    "nonce": "0x2d910f32ffff53c9a708f3f8c5ffd4fc525ea2dd987b1b319ce2850b6a2f53e2",
    "signature": "0x3e2837aba17e209beffd92dc7a0f47ee465d7839a2faaf322217b9d5aec3efcb25a5310bf124847c51e6dce15dda1966049fb9bdfdf76cee8575403810bd2e3f1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}