{
  "manageEntity": {
    "action": "Save",
    "entityId": "244641935",
    "entityType": "Track",
    "nonce": "0x01e483fd29cd87a26d7489b0d7e7479ba62ae3ca515f113be66f602218a0dc64",
    "signature": "0x29032be66b2d5c0e2859df4f23bcd15d079b57b8d25773695382c7f02f6fc28343b518de3a3f33cde5a50d92e139d5ba21f94a7eaa9a5b05c8edb21c5986faeb1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}