{
  "manageEntity": {
    "action": "Save",
    "entityId": "211418555",
    "entityType": "Track",
    "nonce": "0x3e96a0b097b73aa2f81d0ea4df9a9960337ba5d1e52a19ae4a8e86b3e32a1471",
    "signature": "0x43adf5eb6d73be922b75ed0bbbac56080ac0fafd6c6914ca1abae30285dad6cb2c6587c31e4853beebce5e216e6623fd6a724bdf485d49cf00cc13fa411f0f841b",
    "signer": "0x99b5F46ae3978FB02A645f824e51700B327f1d6e",
    "userId": "97654"
  }
}