{
  "manageEntity": {
    "action": "Save",
    "entityId": "183083921",
    "entityType": "Track",
    "nonce": "0xf3affaa79a36df587f7dd182bb6fffc534608a39b4b68343db03ffc27430898a",
    "signature": "0xf9f7cfa9cf5922301ee033267763a670c25b01c5cc0f0b5292298b503f7d9c8e52f590745cca26217312a718b07b39807cbf1e26f5c98ee713fdf0fc26b5f8e91c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}