{
  "manageEntity": {
    "action": "Save",
    "entityId": "2040775222",
    "entityType": "Track",
    "nonce": "0xdfa74144ef3626c1b815e2c371aecee67fe5b5fca40b10f3b547ceb252fc7c74",
    "signature": "0xbb6a914a421a02baadac842fd2a73cdfd52fbd5a70a1c7885dc43882fce93f5332dcee92d1e1b2ad2e42b48e326f1d848deae59a73c017ce47e58faf69ba70ae1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}