{
  "manageEntity": {
    "action": "Update",
    "entityId": "515515570",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x16f0e923df6aeca2c11cde6973806bfb84ebdee750c30a638c8c2916d74b8bda",
    "signature": "0xa511b0fbb6b8fab3eecedd9d2eb2092871ace859e2c252ae23dda829f13941877431e51c580663f2214d8427afc351993f7723f5c21c2578fd1894129bbe53571c",
    "signer": "0x044b6dc2f0401C0D2510fD3aF19C850F1851c7cF",
    "userId": "515515570"
  }
}