{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7e196964c19b3927cbd33fa3c73322f820019d5ec1955ba24031daec44e53baa",
    "signature": "0x521fee08d12bff2453b0a65f57d84bcbca740ca1a919d3361ac18de44c61206155bb47042d05b4c4e43229168dec2071a7c24795237fdc70f1e52c4771b2a49a1b",
    "signer": "0x85F3dE6E533ca5A34C56A0eE6d30251a26c4B00f",
    "userId": "846467322"
  }
}