{
  "manageEntity": {
    "action": "Save",
    "entityId": "1985641309",
    "entityType": "Track",
    "nonce": "0x7828c90e58b20344be031e30af74b53eb92f266360c4e4c10fdca12d2ea3d61d",
    "signature": "0xf798915352e16034e22965a75963390af7c3476c77f4ec1ed14b771722759d770fceffeb9e8bda83ea7b3fbab8e4b89f7145e2fac52991023f8a635abfcdc7f51c",
    "signer": "0x4086Dda2D91F77cd46De0859a4de37F888508faA",
    "userId": "568518925"
  }
}