{
  "manageEntity": {
    "action": "Save",
    "entityId": "1625015474",
    "entityType": "Track",
    "nonce": "0x06f0e41bfcb428df0ec414e22618f6338d99ab62152cb9a0c832eaf6eb24158c",
    "signature": "0xf5fd228f909d4d1a22d6b5f43bf829696ec33b210c468ad887b8e7778bd51b9d42be7c2e0e4f1f2be83c30607657f7ec1444d67c38a6e7fa785ddff2690e00541c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}