{
  "manageEntity": {
    "action": "Save",
    "entityId": "1403924042",
    "entityType": "Track",
    "nonce": "0xe39385762faf5552f604c4b00dbfe2857b34c3ef35b349df43aab609059d4d35",
    "signature": "0x3105bf066b689fffd13437ca4b52fa81a29cfa873193057d252a21591a15796e3bb10d58b3cd21423f27caeb5f246f513290bc0fd10cf68a155743f03f4768051c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}