{
  "manageEntity": {
    "action": "Update",
    "entityId": "900896166",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x76e738f3e9ef3b07a842f77d295fbef4a074419839220d48affafa0f76f34c85",
    "signature": "0x4d969de88049cf99095039f11900b8b31c162c6195825c3e3bdb290a0ac687fa30e1694e4a1f107bc54fa091f553698bec3e1a782bb65609c4164451a73d1ab81b",
    "signer": "0x8a00178391c182B22F97d7dCcAa7857CcF408377",
    "userId": "900896166"
  }
}