{
  "manageEntity": {
    "action": "Save",
    "entityId": "909612864",
    "entityType": "Track",
    "nonce": "0x5dd14184b344fab2e5c43dda77dfc0b21a6e94eba21506f3e7948e028f6fed56",
    "signature": "0xd9e7017e058b9ed3e1d9cf49f793b9d2ed8edf87713712835639b9c92446de2145073759068e8262d770a011ebbf423ea4849797788ef4f59742815392dbb3311b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}