{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x77f46135980caa9618b7fc1fff485fa4b205499721b000282c4695995ee6ad27",
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    "signer": "0x2c53863503f8F734Fe44b2cCd02B493f8d284d00",
    "userId": "133059980"
  }
}