{
  "manageEntity": {
    "action": "Save",
    "entityId": "987022914",
    "entityType": "Track",
    "nonce": "0xe40cb84df377b973800c35a875c97f398c3c7141765b550060ca890530800190",
    "signature": "0x0401d881de49eac502f94fd5f165b3a1a86d49a8c2c6f49f98cffe6ce38a30d53d833a38ff88e40d0499c8ac3880d8b1f80dcf014535d017d2876a6803f647581b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}