{
  "manageEntity": {
    "action": "Save",
    "entityId": "1530231616",
    "entityType": "Track",
    "nonce": "0x561138711f931b0151f729c0627a13a623ca05802b689edc04431fdbe0d59f8a",
    "signature": "0x8ca43c1420ebeb17e8699042ceb1cb09bec62ca0b2200a7c6bcdeaff43633e555e2899acf11bf66182a40ef2b12b29c0efdcb31f384115cca3d449bb4e66a3431b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}