{
  "manageEntity": {
    "action": "Save",
    "entityId": "179109734",
    "entityType": "Track",
    "nonce": "0x55b3a06d665902cfef1c01f62105a2292a903810ad50aef7c53321610914c31d",
    "signature": "0xfa7345a88c497046038fe37c6f4cc4891d74f2af96007f1a1ed8d5bd966b8e793a0fbdcd627ffe7c7053d32f62e06c8dc68e4f2acf03fb8140a50689e58684f91b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}