{
  "manageEntity": {
    "action": "Save",
    "entityId": "1345243162",
    "entityType": "Track",
    "nonce": "0xf906756698e8ee71f1870b9ecbb7381decba34b9b01b3d1116f213a3018c7032",
    "signature": "0x5939151d81cd8f6d64d9cb42cd1f6b1100b2d5c3a80788add3dea8e1396d4523450d1c762dc8559ddfe2f469c10ac0d799827e716c86d1be80034c2de6604e201c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}