{
  "manageEntity": {
    "action": "Save",
    "entityId": "1375222717",
    "entityType": "Track",
    "nonce": "1793112423400141776",
    "signature": "0x3008544c64c39276be02eb70989f13fe57146e050db3d54e99c7ddfe7f7245ee69a9ee9b3597bcef1c9f633cb1d91d5a4dbe3b1579749d668745e2d46e3a9a401c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}