{
  "manageEntity": {
    "action": "Save",
    "entityId": "624066",
    "entityType": "Track",
    "nonce": "0xbd6c30a0b7bb3bc10cf95b595d12ffb4fdbc79ce8e3fdae9c30221490ad47cf0",
    "signature": "0xf2076bc556ea8e6fcfd2436402b1782696514c5fc0b3a69d9d0c9076bad52c4b60cd11ea16aa60f623a692994e8056c90df359484feacf026ddcb0c86d3b1eda1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}