{
  "manageEntity": {
    "action": "Update",
    "entityId": "509819410",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xe70759224e844fd2c12d0049d5e829e54ea3493895e5c6873e341a98b4662c66",
    "signature": "0xc968173935083f6c645a9e30fc058ce9154050a1a05f9dec5373b512a9a759a31f33ac26df02a7ddb0281580436971218c1146aabc1f91bc01ff1eb74ad402ba1b",
    "signer": "0x792632D35Fca4cc5abA0bc6B33a3F6729b4ACf3D",
    "userId": "509819410"
  }
}