{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x90c2535ccc77519a76971530b672abc555a0558cee6e930fa42cf95c606379ee",
    "signature": "0x5232bd1c0541f5dd6b4c7e3d8ef9339c2e9f58c6cca2b61df96428daeb28b9533e85c92efb0ba03b287c9d0617942e6cfd15eebd6e1a044562ca7ca15d9b05a11c",
    "signer": "0x0D2c1331F52a98aF1Bd206E3C28062E717CA9E51",
    "userId": "597927803"
  }
}