{
  "manageEntity": {
    "action": "Save",
    "entityId": "174477722",
    "entityType": "Track",
    "nonce": "0x61cc61c280390664236e4c85cb4336d22fd762ba2ab75bf71d907cc6950578c5",
    "signature": "0x07c22231b54134e5f3fdbf70fb81e02fdb59924e15bec69aeedf695a35beaaa81e92fae419b7364f1b31567747706e113ddb1f2c3cb9f55de2f2fad8810a784b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}