{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3c09e1dddd1db36ceb2283af8be0d548f825ab6d212826c01bcafca079a5ef2b",
    "signature": "0x91dff8fedd1197d18847d67525720115f0a771b9f37a52f3e2d6df5c6ba3b6374bd0cf996328dee1c8a2c22911c9f60d2e6fc0b8bf0abba4fdb2b9730d3d1ce51b",
    "signer": "0x9833FfA856beA23F98Ee40D5Efc8f1c4c39877ff",
    "userId": "61775556"
  }
}