{
  "manageEntity": {
    "action": "Save",
    "entityId": "1242519357",
    "entityType": "Track",
    "nonce": "0x74b4114972e9a7938f79df91faaf2c25e289afbf23791d39a7313fc1e14bb3aa",
    "signature": "0xfd8c8a3ca485e1d65545face2d8a6eb304b1df54e830925cb8f11cdfe9cb493d4624a14c861de3f643c3cb0fa9f1b108352585e6f245894d8c587d7c77e3f5461c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}