{
  "manageEntity": {
    "action": "Update",
    "entityId": "648959487",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8c9238ce6e18b1c3a828ac48339c21078ccf66bd42b835e7ac05a433dc6b73f2",
    "signature": "0xb014de31ceef36ec1c1b6a2cd174aa25f0d43486691713286746627e7f55608f120a2106be304aa1bb0e4ca4a8a99c6288713aa2dd23cc0ec377bcba79769e6b1b",
    "signer": "0x7b8621A65C6FD0422223367A535BB694317A7cda",
    "userId": "648959487"
  }
}