{
  "manageEntity": {
    "action": "Save",
    "entityId": "865238801",
    "entityType": "Track",
    "nonce": "0x7c474003b6dbf614acd263afd12674f7ccbfb7eb37707502c7b0882daf40b107",
    "signature": "0x0bd5384e92f17e68329f68630c553f2e76ae8555b30a9e6850388ad8a6933f811be7c3b9eb7cbf130dd667305c6416e95b34ef3ec921624a05293fe2232764f71b",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}