{
  "manageEntity": {
    "action": "Save",
    "entityId": "378102",
    "entityType": "Track",
    "nonce": "0x6d942984b79b13244fd7cd2be9b8e63cfdd9f62117a0d5e83dc2307f9ce8d0f1",
    "signature": "0xc1676fe239c3b6a857ffc465c1c0f674f34f4814abc872571f23a20243365a6c2a84e1aa52ea42454919d6de9a22326facbb9f8c1e1f7f206917cae2fcfaec1d1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}