{
  "manageEntity": {
    "action": "Save",
    "entityId": "51349",
    "entityType": "Track",
    "nonce": "0xda00e6db1d85891459b173d4203c24f687540add66c41e941c1903018d5c48b5",
    "signature": "0x6b3248248e9172875c1be13875dfd2d7c8ab91c061b7870629d9a53aecdd8fe07a3c32d1714304e2987b74fb138d49126956f7e2b1ad5e3e1df8c2562e4027b81c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}