{
  "manageEntity": {
    "action": "Save",
    "entityId": "954466",
    "entityType": "Track",
    "nonce": "0x56f28577be2c8608b17295875cb069c14e3cec88832d62928504b43f4c9f768a",
    "signature": "0x8cfc94aa2960278c71dad5d68f9552ed504663dddcd2a3b1cde153013f076e686d224866b48a5ad77189d5f1a6d0190e627959120ee914b16a2d4da8d04c2ac21c",
    "signer": "0xd9bA17330fFb3Ea1356C5eC14971D9e1f2cb5200",
    "userId": "337125448"
  }
}