{
  "manageEntity": {
    "action": "Save",
    "entityId": "1217459262",
    "entityType": "Track",
    "nonce": "0x35f1bcc0dd1f47cd4f02eb271e037daea541666aa0bd0233924a4a68746f1961",
    "signature": "0x4c6332441d01b0333d6c1847df34b8d362b08f08cbc01a8fd7ff25a6aabe8b046494269887314dd1d2df9888eb713283c17e3212bfb1cb92b4668fd3d88dc98f1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}