{
  "manageEntity": {
    "action": "Update",
    "entityId": "373509365",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x7e7a74f4d059532b3da32abbe8bb939e1adb53a53ca459372b756cf055d60178",
    "signature": "0xd53666ef39f83dbdbf2ac75d4bc630672e58f4280a43928cede332f02389a92b6d5de800dd3e80a7ecb2a493b2d74d6d25f615c475e2f03c44737f6efde5e61e1c",
    "signer": "0xE0dF9407B39a8Ec91567DE1940F988b6e37C17F5",
    "userId": "373509365"
  }
}