{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x71d2b23c971a216aa9a55e80b5356a1065661858564d77f6a9a746e564d137a7",
    "signature": "0x2bcf1a325c722d5ad3b810e5fbf520de3334d7ac531e8c5246313c8cebb58dd55713a63fd68d284899b9508a03404c35105c75f2d75c7a8eac006a06baffbcdb1b",
    "signer": "0xd6423079fb372A2e2D5663C1Ec2Ea96E0EcD936C",
    "userId": "752553873"
  }
}