{
  "manageEntity": {
    "action": "Save",
    "entityId": "2005915381",
    "entityType": "Track",
    "nonce": "0xa6f02b29fcc026400479d3a7c0757f246fc8b7f03bda09153406ec4f61c9e492",
    "signature": "0xb3a93d53366c31c6b7764419b74a97074ba84a864a667cf5f3982c6ac4d9342e1479a5fc2d119ae020475c415a3378b3b5223baf41ae0150b01a5de5a2fa20101b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}