{
  "manageEntity": {
    "action": "Unsave",
    "entityId": "758330642",
    "entityType": "Track",
    "nonce": "0x51f70f9acb6acd58f9da9170b4bbfdfb0f71a50f603a99d29185138bdc0b5a25",
    "signature": "0x9c0e8371808221d4eb67e9e874414d8f5fcc42b51d2247c6c887856b2124e6956fd3e2b4c63061be356b48cd900cd33ed62eea8b18d3b455c446a28601ace7e41b",
    "signer": "0xBa78A922743a11E13Bcb8d524078524Ab030e2F1",
    "userId": "499499349"
  }
}