{
  "manageEntity": {
    "action": "Save",
    "entityId": "435280237",
    "entityType": "Track",
    "nonce": "0xa23dc71674b64167575982f086286af6ac75451b1dd55612a4f85d1230e6659e",
    "signature": "0x12edf9472ce2af4cca8ae85c8da3c019306e6b8f43c24b516c47568bc032258a4dc37926277bd523fe0d358f7cd522efe2be169871b2e90b57bbfe86bb458a9a1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}