{
  "manageEntity": {
    "action": "Save",
    "entityId": "1833646322",
    "entityType": "Track",
    "nonce": "0x0551ba3252f85baa3ecaa513662501a0c5244a4a2f67d1ddce7039af63d59b35",
    "signature": "0xe467967c2a3a00accb1080b881d894ac2ed428fddb5b26bbcc9abf869496000a43fe9f92632389cdcaec68b53597ae8b6dc5b35e3643314fda3f9226288269371b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}