{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x19dda05f81edaa23abf5285a03dcb48debb826dde415788e902b482ab72bf75f",
    "signature": "0x30d06fa3d968b5774a3ba02d0b06f97b5b1dec8cd5d47771d2e8760a296f91487a0d473b301e6c33914235f1b53cc7c722020b5cd68fb2ec557de6d610d99b8c1b",
    "signer": "0xe5Df73018B54535AE94ee1d767f38a43995aeC41",
    "userId": "676062825"
  }
}