{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2fd8837ffe2ea26cb856e0bad80140cc0f19c0d8543282a87b53da0e01237693",
    "signature": "0xdce3ee6f04498b0a2887759e9c7ccf671e26420b49bf67a633a0b854558866061e1acae26ed5606556519407c9e3807420e5014709a91300aab6a8136e05fb841b",
    "signer": "0x2a3494ddDB5D34Cb2778C63dC6e5eBeF02071FcA",
    "userId": "280220384"
  }
}