{
  "manageEntity": {
    "action": "Save",
    "entityId": "456225346",
    "entityType": "Track",
    "nonce": "0x570bbb24ecc9251522e02ea2d0422e81df4e91e46e2ea6c31c17a3c5ec3a1cd0",
    "signature": "0xb706550f5de4f78401f59f2dbbe0bd9500a9cef5126191a143f3b529b02772fa2aae568eb30e2a44014cb3c6720fc32548350e8774ed5ed988141997433ff6a81c",
    "signer": "0x19ee5E3A31ce66CE689e96b87E3583f3B75fD98A",
    "userId": "124060"
  }
}