{
  "manageEntity": {
    "action": "Save",
    "entityId": "834484284",
    "entityType": "Track",
    "nonce": "0x131cfff4b79efb43bde3d460683eabb4b454106907de70bd58ac5d9ce3ed7814",
    "signature": "0x9978d524b96fca5f6978466afb3696dd931c210df1242bd2b3124b5ec8a505aa5aad1e0172c257c471928562f4c45741cd6d7bedf242b242bd3f7b90b522b7571b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}