{
  "manageEntity": {
    "action": "Save",
    "entityId": "994664018",
    "entityType": "Track",
    "nonce": "0xa022135365e7e7f164dd94b810ea4cc5ab48fa064e9ba4bf47b2d9e991604d48",
    "signature": "0xa512ecb526e26cb25e3ce341d556854793279ac4200e105dd3d65c55c37c13c6543d8493ef212ca5e65789df5f28019ea6f31953afc1cbff3ca0e28831e47be11b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}