{
  "manageEntity": {
    "action": "Save",
    "entityId": "2039243795",
    "entityType": "Track",
    "nonce": "0x4fc3cbd77ba1428e01e2beeca411fbfc0a3f8640540631c1d6bbcdfecf394101",
    "signature": "0x4bbe966821aecd2be72039af8e61bcaec8e01f2cfec94995fb2f22dfb46e52d412b94894505421fac75158f3bedc4926349973f88a8bad72fffb4ed2a04007691b",
    "signer": "0xc03cf24b1C519dA6a18B6509c7F5C57d01620755",
    "userId": "870665506"
  }
}