{
  "manageEntity": {
    "action": "Save",
    "entityId": "213940314",
    "entityType": "Track",
    "nonce": "0xaaabe93b420bdf50f531b6f3e4317f430dbde9bc049f20a5b50123d3a983107f",
    "signature": "0x0e737aa58b7184fcfdee21d0222da4d2d4e80fb27d8e2cc886e1ddce600437ea7cc32c1861fe0dd432c50c2ae76c5bfdaeb2e63ae269e81b1963f7531392ce061b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}