{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "251250004",
    "entityType": "Track",
    "nonce": "0x76d7d9fe0a186c58927b3f739ade8c86111436135c4ca9d43a5c73ea80f64091",
    "signature": "0x0fc008fc30bdfd5db49fdd77db9ccba430ce8f4c87f03e56718bd08ebc66c31b6a75dad7a03c3b775133e5bccb79d22b6fcdeb4405dd0ddcf3301b2d277cbe591c",
    "signer": "0x76433fcfc10E04743aB4EB98660d4B47526AD243",
    "userId": "328228955"
  }
}