{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7e891a4d5db644df15e6d36ef2642a1037ca6ca5d2df9fccf88dc8d1180920ef",
    "signature": "0x36f8daed2d36d14a628cda03b4e45efab5fce604fcde953c72e9be30e6c9ebba08362bb5e9175b7d930506f517ddef4eeae2927046ec351233c5a4973bd6b4c51c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}