{
  "manageEntity": {
    "action": "Delete",
    "entityId": "621864437",
    "entityType": "Track",
    "nonce": "0x1d4fc3c01dbf8ed344b9865bbaad382f7a821f85f41d85012a201e4a61d962a5",
    "signature": "0x09144d108c462ae6ef92708a03b3339f23dd831cd0fd41d96eedb9253648d9a30050eac6b10109ba83b3a2d98d80ff44ac5a491a6811393c66e690793c40c8901b",
    "signer": "0xD1e78d368b6e1BA9c3281E18c08B03ccc78b50EA",
    "userId": "509716406"
  }
}