{
  "manageEntity": {
    "action": "Save",
    "entityId": "53575",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x50897642c70a0fd187634f0b2d5675cc6cd5f25a5d3be67c9bcad781e8c2b5f9",
    "signature": "0x551bc6ffdb3b1d3a0715f36d13947a1e89c58df6de4fbd9aee61e34baf480b6268e36b1deb1d8e51361045970e2285dac2983d6e312392d6d5cf3d64e9d382b71b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}