{
"manageEntity": {
"action": "Save",
"entityId": "84904",
"entityType": "Track",
"nonce": "0x2c1c541410e4ca4b254ba410d1597f12aedc618d527e0d416c97727343a5ca2c",
"signature": "0x5e770014fed9b4eb85880b5814d210f0edba8e66775bbd2d11a4f64b1c5a41f4021980b3efd6afaef70844aad7aedc46a1ed593c442cf43a5f5d4920f9f6bb641c",
"signer": "0x3D4d8a781454E2338c482dE697d6DE1ACc7D9031",
"userId": "599751364"
}
}