{
  "manageEntity": {
    "action": "Save",
    "entityId": "355481312",
    "entityType": "Track",
    "nonce": "0x8b090c1aa017833ca6f3d4584037a47a799a04899a100bf44b6be9d6b4db45cf",
    "signature": "0x8d4a7328dcbeb0e7c894b21dee378054881d2de433f79e1bc5b33c2a753796125fad0006dd83ed2d9a73871af88171e029b027b2836a3c94fb94fdab822284481b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}