{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd7a9a047f0bf52d97d674807f7c3a69caadb3e3b9ada61ee707a3d9a58859c95",
    "signature": "0x68f88a765d688e402b1972fffba78c41a866d6f5e194ce0af3b123a54d6f9a4407a90a0c47b68cfd6b79fdf5032daeb6eb2a5713a2dfdfcc2d83e7436dfbf7fd1c",
    "signer": "0xc6BdD536e3FE1222591b7bC56F3Df6d6a8b74Baa",
    "userId": "387770103"
  }
}