{
  "manageEntity": {
    "action": "Update",
    "entityId": "540238713",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xd7d834b2fdf49c07751c20955390331555a85495dd06c8fec705f62f3036c3fe",
    "signature": "0x68746e4773845414ba3cb0d366e2f9bdc1994331abe06bba5fb3b1e3ec562c906dfa8f3c5079c70a479be3f119b079a8019a44b0510cf135cd1bf3155ee7afd21b",
    "signer": "0x9d4b9d6c08f13bdD52f5B6Cb488a70DC2819e2de",
    "userId": "540238713"
  }
}