{
  "manageEntity": {
    "action": "Save",
    "entityId": "772753095",
    "entityType": "Track",
    "nonce": "0x36a8cc52378070e6b23d4b344d06ac1c8e60f7ca897c8994cab8705c1fbc9a93",
    "signature": "0xaecb738e26ce81c48f486f39de10bfcf499c3bb32014113f19dadb89a1e906a96107c8422abc744c7c714cb7e23ca7725dbdd3bc9558299cc4d37cb9d8ab3b8b1c",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}