{
  "manageEntity": {
    "action": "Save",
    "entityId": "1286085506",
    "entityType": "Track",
    "nonce": "0x4934ed85a4356398a5e66facac073a55d4d0828d2e77b2fea104a95b0b2a8b58",
    "signature": "0xd31827bf843d75f1a8c6cd02b440e19a45f3eaaab27158bc256bf4e7410574e402e45ed0c02de87c5ac38596538b28e90e69e8a6fe84cd3089b94caab68ca18a1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}