{
  "manageEntity": {
    "action": "Save",
    "entityId": "953577",
    "entityType": "Track",
    "nonce": "0xc884a0a6b3f02c4f16f51cbe78fe8f457539aa7fac1af35e0d24c7c56bf67f62",
    "signature": "0x63b1718cda9ef665a906042c2f27b4b85cd70bc34b0e7249289a08596d986d716ba4c3002487b98eb10ea059d9ab05b39ceb2d63c4ede57cbfc7868c092fe30b1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}