{
  "manageEntity": {
    "action": "Save",
    "entityId": "425139094",
    "entityType": "Track",
    "nonce": "0x55def587a863f69f9b7c8249ff4ffa26cb74dff614db286ec2bcab1725842b63",
    "signature": "0xd46162f05bbdeebeb7fa1ad0fd7f7870b536ba64befe8be0036574ab2d1f77b718bfff89e06557f28e44b5ac72ecdce64f41188c36095e2fc4ed2f318e95b22b1b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}