{
  "manageEntity": {
    "action": "Save",
    "entityId": "243354564",
    "entityType": "Track",
    "nonce": "0x4733082c18bddd083d9359dc8544014a60bfbfbc1d2bcf50cd756a358a84bb19",
    "signature": "0x4218265e18e5cfe957840245f5486b1e2f4fdfea85053a27250301ce0460cc7a1181ca4c48b3468d48264b2ebaafba5328a5efc10cd9ae2d3dd927f20a76ccc01c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}