{
  "manageEntity": {
    "action": "Save",
    "entityId": "334660",
    "entityType": "Track",
    "nonce": "0xfcc8567d37b8fcc9faaef863b4f406883d8b82d6f0bc2916ec690a18a4c07a35",
    "signature": "0x2c356b0f4e660618f1790ab53b4fc3127dd610a0a50b90a95924af0a56be235a739fc996832f21c9a654ff682a496879b41c9f955de3f74dbf74c5cc995241da1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}