{
  "manageEntity": {
    "action": "Save",
    "entityId": "1211636695",
    "entityType": "Track",
    "nonce": "0x40c9fcdf1bc86631b195cac45eb9d645f473fc295f484c5e398ad97a3251a8a5",
    "signature": "0x6fdf55c84265f5ea13caea0b4af98fcb3c8cd6e52ef6d4c718cb2c1f5557c6f06f0787cff8e6fa8ecf288115565ca1346a1e8323546658c1c7718675d9a384401c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}