{
  "manageEntity": {
    "action": "Save",
    "entityId": "2137074266",
    "entityType": "Track",
    "nonce": "0x721dbf2939d6f7d4fd83b4a43317f60df8b8ad55715f59126ccf3beddd7461f1",
    "signature": "0x509e7cace2a0ab66ecd260298e05570a7d3f2eb084e80bb0fd12dd0be7ac95ea18cb860f35f8e5e65b7238b46c11c97e8871a54792f6ae19511ca865b67427fa1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}