{
  "manageEntity": {
    "action": "Update",
    "entityId": "502388335",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x891e4ff4ad75d664961de913a4b03eec47816af397dff27c060ff4b3f4e3a247",
    "signature": "0xb0b9f27092ae2c30a24dab6dabab3d5446f2f1b206fd766b70424ca64e5ef5b658e25bc6810dd0e12b069ce7466640eeeaa9934ffa727cb16f6dd51a5b43317e1c",
    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
    "userId": "502388335"
  }
}