{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x362e4b85ae8f408e405914de09730bde16c5dba1966a254f96ade3f3b5ce60e7",
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    "signer": "0xf399Ef3A18BD7C0De206619229371a9f28c8D86b",
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}