{
  "manageEntity": {
    "action": "Save",
    "entityId": "125875683",
    "entityType": "Track",
    "nonce": "0x79f3059b6db903c4bfe1af116ba02e48da192aec041867cbeb71252a510a75d0",
    "signature": "0x8f3a95d7e65c90670766a4eb09d81b724728968e5da4892d6c19a9486c6763ca005c21f7496b011bdcafe65c0e3feaf4a8281c0a0d5858b058bae3a03a4001ff1b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}