{
  "manageEntity": {
    "action": "Save",
    "entityId": "307247",
    "entityType": "Track",
    "nonce": "0xd8622077e754d468cbbe79e45ab2a39714801f0558b22bf00f7aaf6a71e9137f",
    "signature": "0xfcd292ef0d923e62545cb7ec8846827f007d827875a192914986b3038472ec071a00fdef68d63a5f3246ae9d8b1f8ceec3db241bf07d01791a0c102ec2228d261c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}