{
  "manageEntity": {
    "action": "Save",
    "entityId": "1745452679",
    "entityType": "Track",
    "nonce": "0x6e300842bb08e74d0b9186cb12d048487f007db10288deac12faa2ec9f8ff312",
    "signature": "0x2d6f397fa889e698888dfb3b0790fcbbf8949797ee0beff7fd319ce4b7b0c4ce5ccd6e9335ee705c2c2c2acb389c1095ebe4d94dbcc929f78385650fa4826c631c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}