{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa9728637bf9f9bdfac410059636c9ff50339cbc67e0f1a66fdac3a014dae15be",
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    "signer": "0x1282f66a680bECF42EB757906995aBB7e1F26161",
    "userId": "903347673"
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}