{
  "manageEntity": {
    "action": "Update",
    "entityId": "303393509",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x0c8b7277647ef35b4ea93c97b033ac67c6b9cc548619d5d0d2381a1b4083be15",
    "signature": "0xd11eec916d816003ec1a2000acc10ec81881ef5a6841f632e077c4fe0e024f3a13d47435fed32748bf876fdf6fd10a22a153308390b3b32ef603722f6a51556e1b",
    "signer": "0x4E073b7076371ff6Bf848d0B4abA785B38B5ff1E",
    "userId": "303393509"
  }
}