{
  "manageEntity": {
    "action": "Save",
    "entityId": "1837571964",
    "entityType": "Track",
    "nonce": "0x1dcd3818516b86c649383496206ca1561600e9b922f6142d1ae2ce0d3afcb2da",
    "signature": "0x670daa2acaa59730d07252f4b8fda5f7735f9e78ee2faaf49dfb578756dddfdf76dffd516ce3e27fe1413df9f27c42daac105c6a2ee32466db3cc8d1068dbc871b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}