{
  "manageEntity": {
    "action": "Save",
    "entityId": "1947407555",
    "entityType": "Track",
    "nonce": "0x66826a746169b42d8816501993a87fca421dc25633a138d5562414db830146e1",
    "signature": "0xf0b7af2295dfad55832e92d33e306d6bc5ebf895131d0e980a168c0bf3647c977adffac7604ebeadc21cb24f28aa0f5999e023d1357aaf6fa081a0814b1efdc01b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}