{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "1900768940",
    "entityType": "Track",
    "nonce": "0x6f3297f715616d79f0c3eb43466fe5db1adcfddefe934346de3a7e8884d9ef29",
    "signature": "0xaf5bdabf087d604df262799d4dfad65778aa3f7efa83d4383ce1ba7c90a2c2f5215f9750a10724aad049bd2fa7f1d761d05576c6fd3191351d9e97b571e8a62f1b",
    "signer": "0x849938DF063059EbF6d907f55E72C083347C9343",
    "userId": "796529120"
  }
}