{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa1b2a62dbb1e144377aec66e3db494dc4515c12d714f764e687bae273406ff27",
    "signature": "0x3be2079e824576dea0b48715e9d0fd70f349471fdc98aeeb67922c086f3d9607014308061caf7b71008cf3be7d30f05ab0748ef5f5d3c633b89c941000f81fe01b",
    "signer": "0xA819E5C5714510Db532e726DB8526f18026feA20",
    "userId": "505182311"
  }
}