{
  "manageEntity": {
    "action": "Save",
    "entityId": "2069559760",
    "entityType": "Track",
    "nonce": "0x535cbc3c58c453e8049caa8cdaf8133a06cd52e661d29519a77b573e82a5f479",
    "signature": "0xc7521229bcfb0b3e3be69226f976e3857a493928f7ad0438a679fe8674d8aae82d4be6fa60fd04cbdc738560b71eaf1248098d00836cac7f13b629cffacb6ea41b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}