{
  "manageEntity": {
    "action": "Save",
    "entityId": "1770518744",
    "entityType": "Track",
    "nonce": "0xf8e6547ecca6f879b30abb4e90477f2f0e338b91e922a3bded5c2f1124b0f860",
    "signature": "0x0f48db02e3144a0d83a25da26a19840f55f9a17f7d5719fc84f7a5c45dc3c8031501914c192a6a26f2661c11941096ab6651199dcaaeeddf426862ffb92390ef1c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}