{
  "manageEntity": {
    "action": "Save",
    "entityId": "2019328557",
    "entityType": "Track",
    "nonce": "0x20ff812ad7516d5d15bec6c2b743eff67feb58e040fb3dcf833ba6d545df6f8d",
    "signature": "0x5583a5d656110344efc840e9f79c76ac780c4a183c2a84947b5abb80e7c4401870f9048fec95054f852fa10a22833908418c126ea97e5d2d10f41340d3deedfc1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}