{
  "manageEntity": {
    "action": "Save",
    "entityId": "2015907026",
    "entityType": "Track",
    "nonce": "0xb4099259acdd8f00c5cfa906ebb70d9ebf902873e33050fa1334ab6f2b7bccea",
    "signature": "0x990026356987b19f647f47e2ce395e91ddd152da31bea9b89dfd2cc2099d0a276e5c2e17688621d779a03dff7d2338a15657583241e91d070786d86f15180cf31c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}