{
  "manageEntity": {
    "action": "Save",
    "entityId": "1019533890",
    "entityType": "Track",
    "nonce": "0xa1563277d8edfff771d10bbbf57bd4429169a7c751bc553f1f5c3433e97bf529",
    "signature": "0x85ea70bb29f856a5db3fcef8d975790e1d22fe6fa6f077012851148f0839826f33c22fccf87ef60e3b4e49f8c587e1a2c899069cff7a809d67c0d8fa7478f72a1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}