{
  "manageEntity": {
    "action": "Save",
    "entityId": "753159",
    "entityType": "Track",
    "nonce": "0x2fe0fa44042a71e79e4b7432dcd06296caeb56f15a89fa6406b51c141fd3d8bf",
    "signature": "0xe97aa37c913e3176838ef011febeccd69cfc2da62832463d4a76a0535fe0be833a0f49c3fcfeb3a073f121460e03f97d9dad88f347dc4ca6790a427b60a2827f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}