{
  "manageEntity": {
    "action": "Save",
    "entityId": "991725850",
    "entityType": "Track",
    "nonce": "0xb61dbc22845fc07612e704a27aae79b9551ea7fbdd39b8463752628476227a91",
    "signature": "0x859821a3ac7e5157cc69c3286f3b9b9ab255c6f72ff962975f8baf912db61fb72fcd79f91b286681558740e63ffae11b289f1e77d6f64b129d25ff9c258de63d1c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}