{
  "manageEntity": {
    "action": "Save",
    "entityId": "126477",
    "entityType": "Track",
    "nonce": "0x7137b0b8b8832ad7b8f75ec7f5eeb4bce65ed724d628e42b0edc72295091f9b7",
    "signature": "0xc957505bcb32f1d8c7907c22244d9216fb5e748bc9630491ee614d12a318f3f516e544263d7b8a442708b8a5e54cbc89caad95c7abd11a6291e427016cb15f4b1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}