{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb5c02927836d475fe84ac3bfe8d1b7ad9a7d31676d50b369d2c3bd05933e608e",
    "signature": "0x98753d8117d7f0c649667976e0f77d0c7328385f60a2db1bf4c5848e1ccf53283ded3536e3738cb36056690e0c25e62d1072a1b2838edfa559ba8db8fa5221471c",
    "signer": "0x94bc1c80B21F7Fb76e4907b0e895E3D3fc46e079",
    "userId": "564864898"
  }
}