{
  "manageEntity": {
    "action": "Save",
    "entityId": "774007",
    "entityType": "Track",
    "nonce": "0x51e1a42576aac5af68bedcf5aab8261ff02961ae8dc8bf94c8e448b49f915636",
    "signature": "0x971c8e7a87c3afb4bbe2b3e9c25e6fe7656a2e9dbe242969614e0433d2abd7b71c8063981bf6d24eb1265acc02465c27d2a00b22800e71aa0a674ec17a269b8c1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}