{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x980d01f719090f19cddc0fb58b4d625bd0f7a2ed04395fb183b6b57f09374dae",
    "signature": "0x1eca9f7393d1930033271a0dd440a05a5369e093baddbf7e0a531ed4602276691d2ad2279ddd1fc21affe547fd0b2fe534096ff6d91f23e8d1ccd63d885440eb1b",
    "signer": "0xF4Be1e780c06BcF21b6815839CabF01B0c0e7606",
    "userId": "684451248"
  }
}