{
  "manageEntity": {
    "action": "Save",
    "entityId": "1413561457",
    "entityType": "Track",
    "nonce": "0xd5316f04036c27f21a401c48ae2b2385ede3a790bfb7bd3198a93940981018e6",
    "signature": "0xb8c60c9b4f96dcd2be085ff1b673ca72be584f619cb435dc0d95c09f262b383946277cfc6f17934cda2bbd0f18b79923ad973ca57b4726fe7c74a57edf8969201c",
    "signer": "0xe270C91f9476B885124d6c0208211213dC10036a",
    "userId": "94825285"
  }
}