{
  "manageEntity": {
    "action": "Save",
    "entityId": "1839279985",
    "entityType": "Track",
    "nonce": "0xe01f5a6f68f5bf6cab50ea4cb6d534dc4c930456259907a3ba3e5078a178d941",
    "signature": "0xbcbd776f730f6429dee6d8bf3e57eb1f717d673719dc3cdfe62aaa4b79feaba86d484f46dd555a057f09726c613f5570fa372d5896d321098c3b895dd2e4b3e91c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}