{
  "manageEntity": {
    "action": "Save",
    "entityId": "1995524591",
    "entityType": "Track",
    "nonce": "0xef89f87ef32c8de82226e9d23051dc07354b3fc50a71a04672ae475f7e4d297d",
    "signature": "0x4767a4ecc5c3317a42d7437bc900f8c08782ebf8ede4415a6eb0161d0fe804e568b1ababb534d56cfbcfd8a13094159c49ebeba8035de350df12fbd6915e35801c",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}