{
  "manageEntity": {
    "action": "Update",
    "entityId": "575941305",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x2050aa98b324614b9d66427479c90db619a01aa074f4b0bf42f07b28d1541a78",
    "signature": "0xf6c4e4d42af777fe7d9e830cd1e0b531ebff5c40dd563f40e1a2661f7528ac2666c35adc43496edc6b9a68f138738d2a710401bf139824f6499cd3ce49af483d1b",
    "signer": "0x3107eD9fc80586B8D3314FE60dc8fE1250CB89d5",
    "userId": "575941305"
  }
}