{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6e36d9f39a95667494e164b01bb08bdc4bef1253bf1c4ff25a4e544edccb642b",
    "signature": "0x6fda39d8767bdb3587875b8e996b3c03247d567681e19d8ab5bc9413b264774e0ad9cd4730c0a6e2cd9836ee45e009999d6ab63957f8741a56366eb209bd62aa1b",
    "signer": "0x842Bf8483c32FE707f061aa9c95d8DE78dDE6553",
    "userId": "275145996"
  }
}