{
  "manageEntity": {
    "action": "Update",
    "entityId": "852557974",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf299bea1606fc84536efa4aa07483a3dc010c6c7259bda02f82154b434bc92c1",
    "signature": "0x1e40666bb7448068a481a1967d2a5c23bb18be46ded4b32562558037f76a61ce107efd805bfeaf2fcd41bb76a514e7a876b822f8c4fcbafaf679e708f0decc8f1c",
    "signer": "0x9e2521FaffBd1356fbEC0f30529b13fa87f0AAff",
    "userId": "852557974"
  }
}