{
  "manageEntity": {
    "action": "Save",
    "entityId": "1932526843",
    "entityType": "Track",
    "nonce": "0x60c1e011263fd54c93615c0181d51452cf3b2f1a01d42a5ed9e84fcd44f197b2",
    "signature": "0xd987f36bdfa90fe72678b36f3c1456d1fca25ce4aea62a203dbce91c582f866211c9b0e51117464c967d273ba808b465e16286a07709edea8d1652353fd072ec1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}