{
  "manageEntity": {
    "action": "Save",
    "entityId": "535640091",
    "entityType": "Track",
    "nonce": "0x4a642105d7e7ce1bc23379dfeceead8d8e3d383f568d275b885c0c638462bdc7",
    "signature": "0xcd2844e98840e7ba192d692d83a0a71e20e498b35eef2730bd2cb4c27a2b09a31347fa2329bd7fb04c9d444a91c83c41c75ca4464e3f2eac09b8ebab68f6c45f1c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}