{
  "manageEntity": {
    "action": "Save",
    "entityId": "2003324836",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfe0d6723c4179da5173a11486ccaf24eaba76d737a8907c538a4e7752fe4de1e",
    "signature": "0x440530b1c8f3e6692a3903edaa1f1fffa6cfb3a463a2ee13b1a197590fb8043c3909e57b310467dd8bb397de5b03415dfd718543ce208843d66315d7aeb913d11b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}