{
  "manageEntity": {
    "action": "Save",
    "entityId": "1442983162",
    "entityType": "Track",
    "nonce": "0xb631179eb989e62f284ead1de3e02b305ed08bd7e5553bddc0b4081bed463318",
    "signature": "0x38901f4b67a1e8b8cfcb260d6725307e57a727a22c5c5997cced95d7f9ac067366dfcd9f3d7745c35ccf151681e2e297d9e4201e6c16c5095e1d50c75f262fe31c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}