{
  "manageEntity": {
    "action": "Save",
    "entityId": "495613098",
    "entityType": "Track",
    "nonce": "0x611a726d8c2d12105a79b7b77249b1c81aa8b71dda38028ef06ce2f67a7d6f3f",
    "signature": "0xf913035106bfc492336bf37b6407d92dc5d6407994da11444ba8736862a038205aa540cee2f7f8e8d345b37a01c8973c459c4311f55e981700e4b71652ab7b601c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}