{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "400197270",
    "entityType": "Track",
    "nonce": "0x0eb935b6c51ce7df18e3a59fccc96fcfa49123eaee3e50030c1b7511ee465c5d",
    "signature": "0x747a664cce59f1e3376bc33f7d53b67730e90cd8e945ce06757baf58b2c47fdf7c0f60b9dba3be30da86c57cef081f56b7b758f0967b9dfdfc5a0bfc0e199d7a1c",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}