{
  "manageEntity": {
    "action": "Save",
    "entityId": "1352506965",
    "entityType": "Track",
    "nonce": "0x8e2780ffb8174206ececd36019a0342c6c1dec8a89b817f123675206a23f6be2",
    "signature": "0x5ce230c7a2ec5cba49d336eb3a02de3488ef8af76eed495b56efa4f571b544836a569179545c7675cc37068ae1369e8fd3e854c9a6c1917d0b2ac945122d255a1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}