{
  "manageEntity": {
    "action": "Save",
    "entityId": "578917600",
    "entityType": "Track",
    "nonce": "0x8c7ad40b966ea8c62ff72f4fd987ba9b84eb5e1be46b4d0567526b3cacf70666",
    "signature": "0x6e357134545bb4e73b5475f99746c20930f41f956c33a5c8e5fc4cdee70b54d55d687fd682c364ccb7ddd267d9411835b7ce61c85a91962885f779fe9fbbddf51b",
    "signer": "0x4F8e40E75E675f5be20520c4cEA0CbD7bBb999B1",
    "userId": "991796067"
  }
}