{
  "manageEntity": {
    "action": "Update",
    "entityId": "748490297",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x153776f4e77da922656ae8d55ff8834b86cad1ecc20bb1f3cc10b2d426dcbd14",
    "signature": "0x4a0fe961b10532e806f1f9a64b861925d1524a1b11f0d8f3784db1a2518719b11760a8741b896b88479553de8d310faf30d83177bac20ec2032c1a27237d989d1b",
    "signer": "0xb3A9A4e99106cfeb4759823E3BFe3d3CF3eDF146",
    "userId": "748490297"
  }
}