{
  "manageEntity": {
    "action": "Update",
    "entityId": "129460210",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xc364a933559f072550513411686b1019b39107ca15867ae72d8714a9716ce20e",
    "signature": "0xf39a3050869b46c04edee5a1dce8c15b542ecebfdef537ce82e76a660870b8f66ad7c29a39cdfd3840a678a843a945613fdeca4edc6dda5eefcb6332e02779e71c",
    "signer": "0x52Cb91F38E0558Bc7C3b3F9e2A6a4f8AA31f5d5a",
    "userId": "129460210"
  }
}