{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2eec10c7b6a2a7f15b6b80ae8c515d73107778f081b91053f5d93ee5b6b7bae0",
    "signature": "0x29c4679dcf538aac4b5f03bd262151db967928d4a1a43212a0393e952ff343d81a1b0872226c218cd00d84781878d8f014ae4c4eb9b06d2fee3e9dd88ea3a8401c",
    "signer": "0xfcBFD9cc6eAD98a08602C0cDa25b09416f4C367a",
    "userId": "569079080"
  }
}