{
  "manageEntity": {
    "action": "Save",
    "entityId": "87911516",
    "entityType": "Track",
    "nonce": "0x1efc433e17e457c121977a88bbb252d10c29691424b5446c4b5d6aaeb7916bf9",
    "signature": "0x62185234f7b5fa2413e15febd8b5ac2016a0890ddff281f4872d4cfc14ddb27006155df66ae7c5afed2a40f86e2f47bfee9549f1e7934648a625b44ba6e901ab1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}