{
  "manageEntity": {
    "action": "Save",
    "entityId": "62123",
    "entityType": "Track",
    "nonce": "0x3243a4ec5f656dc74b6cb0bfd8243d791386c25a8b4a3a7d57a418c67f0099e5",
    "signature": "0xf8f5136f94d3326150d982895a3b0aa056208ab53e2eb9a201656d1e3339820c2a1ff9596bfb799a817a0188302bc542e833881fc84f446730a1877abbc9b1721c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}