{
  "manageEntity": {
    "action": "Save",
    "entityId": "20396",
    "entityType": "Track",
    "nonce": "0x55b2dfcb039eb5c56e51111a8555ac9c0546c4dab7c354a0ff5ce64812eac503",
    "signature": "0x9633cd4d3182967e397eb2189d24ec94e1b48ad17652ce0192bd921da7259eab06b2c3ffa3aef6fec122c8d37b9886261369347ac625dce16334080ba12654e91c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}