{
  "manageEntity": {
    "action": "Update",
    "entityId": "857551474",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x3e57bd4512a6b4195446f1ae71facd1519d43306664e89c64c938e576907bbce",
    "signature": "0x31f3ea6561f07d2b71c3af2786c1b9d83b5723975f05109e1da1232ec464be0c484acad09fcfd80f95ca4edf5c5b527eb82b4a4492f78d5995d6817a9bb91aae1c",
    "signer": "0x9de29362DF595E6949CaA2820c5c28c3D6b0CEe1",
    "userId": "857551474"
  }
}