{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x11231d0e72362e23d525e2802c52e6cbc41802dd69fe86321f3fc51e6cefcc81",
    "signature": "0x1bda1779e25330e9d69b60d4981e930616e9d3641e2c09e55f237c57233758ef6cfdc61a99c40ff7be8ddbbb7ad70ace714a92e77fbdf6624ae4a1d4a2873bab1c",
    "signer": "0x1f321AaD107eAA50a39561423E690D469Eb63B93",
    "userId": "233040069"
  }
}