{
  "manageEntity": {
    "action": "Save",
    "entityId": "1888342767",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9e01b88401d0b9e1ec0bd3b6ecb552877bd1016af2b9ce8db276f09e8a2517ff",
    "signature": "0xad3ad8720440eb79e2fb2959f94556924902b83eb6701f647671ea0ccdec61e150a9bf880a654781b826a32a81acd55dcda3b6325924fad194f1c0b5f00650141b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}