{
  "manageEntity": {
    "action": "Save",
    "entityId": "25881",
    "entityType": "Track",
    "nonce": "0xeec4f900e435bfd66c6271e4069be133030d76a191ba8c915e4bfe5da32b021c",
    "signature": "0x4a66471d8eab6efeab4825e70b1f9a3ed4be9d8924cf657746f1b21e9ac900f907c0320b90e47756fbf34aad77e6424b7c0f8f76e5583075de2bb60dce40c7321c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}