{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8d1b7bf5474623d959461dabd869ab12d90dfcf6e373ddb0654f1db3c8d92608",
    "signature": "0xa864b44168a9a5178ed066fa5172841062b584933ab983e1650593869150480e71270c3acba43a1a8b2c142983960d092c50b5f9996ea92c0ea040bad099c8ab1c",
    "signer": "0x74Fc36aBC98608deCb410C742455da22Fa04d7A0",
    "userId": "664190072"
  }
}