{
  "manageEntity": {
    "action": "Save",
    "entityId": "2112936203",
    "entityType": "Track",
    "nonce": "0x84be78d773f0a0559b76a63a1d50de551b2e5ee878d05788728a1cffadc9fb54",
    "signature": "0x591e82583e70a7d6c52fba805f8462fe778ef78807181983328dccbaac78cdc20deb420c613b5f2694b72bddcca4ad1defb03be78c7571863698f153c2001f1e1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}