{
  "manageEntity": {
    "action": "Update",
    "entityId": "201386101",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8d929297dea49b1227b2a1d23fd3f4c70d757778e19465bbb8a42c3d11c64968",
    "signature": "0xa877b51c7d5aedcb190a8ad9b835fa23c6e7f1ee35babec59462fac27059453137217378589a6e38b0bff7004322126ab009fc18acfa5242b9b889c8f49c27e91b",
    "signer": "0xF291b54F34fd2AE432A802A671d5AA6bBac155B4",
    "userId": "201386101"
  }
}