{
  "manageEntity": {
    "action": "Update",
    "entityId": "640804276",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xfed45c8e50dce440aacdb82b8455e09afbeca4abcf54a3d2e46360e10d1293e8",
    "signature": "0x8f18b28d29706973a210866407a4cb538b41ff33e5b19d25778ac6ab025ae7e06fde2d7771fde6d557ba500e4e4ace47e636ea5d7e597b6e6bc6f3472e55fd4a1b",
    "signer": "0x2fff57D5628D87Ce98d02775C9cF63dB765aa6c5",
    "userId": "640804276"
  }
}