{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd01f4f05f177df22c47e544d56525ffceb31369f9d7a7a94d4f68799afa94cdb",
    "signature": "0x03220cf02476752b62f0034850f48041c07c60edc6e29f8e013aba6cdf365a39418d7f8ce0a8a3fc8cc5c06c4c829c1ab4dd3111fcde3798a6f0d25380853f121b",
    "signer": "0xDdaE2647cC370a0eae3bb93736cF68BaB9DB8378",
    "userId": "676081895"
  }
}