{
  "manageEntity": {
    "action": "Save",
    "entityId": "1608706332",
    "entityType": "Track",
    "nonce": "0x77172474c4faafc8ad8e50c2e3b715dc09251c3c1e116be74d180883339bb0db",
    "signature": "0x80c22c75d328fda96dfffa025d6d2e9659e21a39b2c3a2a8e805ad0833d18f4e1a79f50c4712d60cede57cbda93dbb4ae463a6756ddc5248c8404db8582ba0941c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}