{
  "manageEntity": {
    "action": "Save",
    "entityId": "1901926209",
    "entityType": "Track",
    "nonce": "0xbee6bb1e740d3963455430049126ce753b432e8389b375872384f8a12d76d456",
    "signature": "0x765d5b4484507525b01140132282f954f9dc3f8b738730dddf7e9fed329110a519c565ed1072a6b050ecfe97ac7e9ecb33eaf7f8582c2c620ad731750a72e6581b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}