{
  "manageEntity": {
    "action": "Save",
    "entityId": "1756065328",
    "entityType": "Track",
    "nonce": "0x59a4859e7986b183e55e02c9f97117dd5a0e4830aa11fffb7b3f18b41382127d",
    "signature": "0x6a53e9a0373067c1714aac961a92a472bfd161ae7b4e18743e6db9e76f23591c2cba5f0103a9ddb4954f0ecd064cd382a38a2a8676f7be44f5c8e0afb46ae0221c",
    "signer": "0x1642AB480EAD0cea9776277347Cbd3e5Fe9889f6",
    "userId": "711757920"
  }
}